JP2007099362A - Sealed container for hot drink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealed container for a hot drink which surely prevents the drink from leaking through a welded part between a flange of a container body and a lid caused by the expansion of air inside the container body caused by the heat of the hot drink contained in the container body. <P>SOLUTION: According to the sealed container for the hot drink, the container body A has a cross section of a polygon with 8 to 16 angles. The cross section of each face 8 of the polygon is a straight line, or an arc slightly projecting inwardly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a sealed container for hot beverages such as coffee, tea, and soup that are sold by heating in stores and a sealed container containing hot beverages.

  An aluminum foil core layer and a synthetic glass coating layer formed on both sides thereof and a tapered cup-shaped container having a flange, and a heat sealing material layer on the lower surface and aluminum fused to the upper surface of the flange of the container A sealed container for beverages comprising a foil lid is already known as shown in Patent Document 1 below. In this container, a part of the lid fused to the upper surface of the flange is removed from the flange to obtain a drinking mouth. However, since the lid is fused to the flange, it is difficult to peel off, and if it is peeled off by force, the beverage in the container may spill. In addition, if a passenger car is placed in a car with a leftover drink in the car, the drink may spill out of the mouth due to vibration of the car. Alternatively, a pointed straw may be inserted into the container through the lid without taking off a part of the lid, and then drunk. However, this is only a cold beverage and is not suitable for a hot beverage.

Therefore, in order to solve the above problems, a lid communication port forming member that is swingably disposed in an opening provided on the top wall and a vertical cross-section inverted L-shaped hem for covering the upper end of the container at the lower end Patent Documents 2 and 3 below propose a sealed container in which a short cylindrical cap having a base is attached to a container with a lid.
JP 2005-153894 A JP 2004-123155 A JP 2005-22757 A

  In a sealed container for hot beverages having a circular cross section as shown in the drawings of Patent Document 2 and Patent Document 3, the internal pressure rises due to air expansion in the container when the container-sealed beverage is heated. To do. As a result, a load is applied to the fused portion of the flange of the container and the lid, and a gap may be formed in the fused portion, and the beverage may leak out.

  An object of the present invention is to seal a hot beverage that can reliably prevent the beverage from leaking from the fused portion of the flange and lid of the container due to air expansion in the container resulting from the contents of the container being a hot beverage. It is in providing a container and a sealed container containing a hot beverage.

  A sealed container for a hot beverage according to the invention of claim 1 comprises a tapered cup-like container having a flange formed entirely on an aluminum foil core layer and a synthetic resin coating layer formed on both surfaces thereof, and a heat sealing material on the lower surface. A lid made of aluminum foil that has a layer and is fused to the upper surface of the flange of the container; a lid communication port forming member that is attached to the upper end of the container and is swingably disposed in an opening provided on the top wall; In a sealed container for beverages comprising a short cylindrical cap having an inverted L-shaped vertical section for covering the upper end of the container at the lower end, the container has a transverse cross section of 8 to 16 polygons, and The cross section is linear or slightly convex inward.

  The sealed container for hot beverage according to the invention of claim 2 is a container in which the beverage is filled in the container of the sealed container for hot beverage according to claim 1 and sealed with a lid and heated.

  In the invention of claim 1, as a method of forming the synthetic resin coating layer on both surfaces of the aluminum foil core layer, there are a method of bonding a synthetic resin film to the aluminum foil and a method of coating the aluminum foil with the synthetic resin. Specific examples of the synthetic resin used on the outer surface side of the container include polyethylene, polypropylene, polyester and copolymers thereof in the case of a film, and thermosetting acrylic resin and epoxy resin in the case of coating. . In addition, since the synthetic resin used on the inner surface side of the container is required to have a heat sealing property in the flange portion, specific examples thereof include polyethylene, polypropylene, polyester, and copolymers thereof in the case of a film. In the case of coating, vinyl chloride acetate and acid-modified polyolefin are exemplified.

  The number of corners of the cross-sectional polygon of the container is limited to 8 to 16 corners. When the number of corners is less than 8 corners, it is difficult to fit and fit only when the container is placed and transported. This is because, if the number is large, the cross section is close to a circle, so that the cross section has the problem of a circular container as it is.

  In order to form a curl edge insertion groove on the inner surface of the vertical wall of the cap hem part between the same and the horizontal wall, a vertical cross-section convex arc-shaped rib is provided and a lower winding curl edge is formed on the flange. Good. In this way, when the cap is put on the upper end of the container, the vertical cross-section convex arc-shaped rib rides over the curl edge downward, and the curl edge is fitted into the groove of the cap so that the cap is fixed to the container. Attachment to the container can be performed very smoothly. Further, since the curl edge is a lower curl edge wound from the top to the bottom, when the beverage is filled with the beverage, the beverage does not enter the curl edge from the gap at the winding end.

In addition, a vertical cross-section V-shaped annular groove is provided in the curl base of the curl edge, and a vertical cross-section V-shaped lid biting annular hanging ridge is provided on the bottom surface of the horizontal wall of the cap skirt and corresponding to the annular groove. The height of the hanging ridge is preferably the same as the depth of the annular groove or slightly longer than the depth of the annular groove. In this way, when the cap is applied to the container, the annular projecting ridge bites into the lid and pushes it into the bottom of the annular groove, so that after the communication port is formed in the lid, the container and the cap It is possible to reliably prevent the beverage from leaking from the gap by the lid digging in the annular hanging ridge. Moreover, since the curled edge is sandwiched and held from above and below by the annular hanging protrusion and the convex circular rib having a vertical cross section, the cap is firmly fixed to the container. The height of the cover biting annular ridge and the depth of the annular groove are preferably 0.3 to 1.0 mm. If it is less than 0.3 mm, the beverage blocking effect is insufficient, and even if it exceeds 1 mm, the effect does not change. The height of the lid biting annular ridge is preferably about 0.2 mm longer than the depth of the annular groove. This is because the container material and the lid material have cushioning properties, and the contents are less likely to leak if they are slightly bitten.
Furthermore, one vertical cross-section V-shaped lid pressing ring-shaped hanging ridge is provided at a predetermined interval at the inner position of the cover-cutting annular hanging ridge, or a vertical section V-shaped lid holding ring-shaped hanging ridge whose height is lower than the height of the lid biting annular hanging ridge If two are provided, the leakage prevention action of the beverage is further ensured.

  In addition, the heat sealing material layer of the lid is used to prevent the beverage from leaking due to the internal pressure rising due to the air expansion in the container and applying a load to the fused part of the flange and the lid of the container, creating a gap in the fused part. When the sealing condition is selected so that the sealing strength is increased, if the bottom of the container is flat, the bottom wall of the container is deformed due to an increase in the internal pressure of the container, and further, the bottom wall expands downward, and the container is placed on a table or the like. If placed on top, the container will fall over. In order to prevent this, the bottom wall of the container has, in a vertical cross section, a downward convex arc-shaped outer edge ring portion, an upward convex arc-shaped spherical raised bottom portion, and an obliquely upward intermediate ring portion connecting the outer edge annular portion and the spherical raised bottom portion. The radius of curvature R1 of the cross-section arc of the outer ring portion is 1.5 to 5 mm, the radius of curvature R2 of the cross-section arc of the spherically raised bottom portion is larger than the radius of the bottom inner diameter of the container and 100 mm or less, It is preferable that the radius of curvature R3 is 3 to 10 mm to satisfy R1 <R3 <R2, and the height of the spherically raised bottom is 5 to 10 mm and is 2 to 4 times that of R1. With such a cross-sectional shape, when the internal pressure of the container rises, the bottom of the container is difficult to deform, and even if the internal pressure of the container is very high and the bottom of the container bulges downward, only the spherically raised bottom is downward. It only flips, and because of its height it does not touch the table. If R1 is less than 1.5 mm, the material may break during molding. If it exceeds 5 mm, the material is weak and easily deformed against impact from the outside, or starts from the bottom of the outer edge ring due to internal pressure. As a result, the entire bottom wall is easily reversed. If R2 is less than or equal to the radius of the inner diameter of the bottom of the container, the spherically raised bottom is difficult to connect to the intermediate ring, and the height of the bottom becomes too high when trying to connect, and the material may break during molding. There is also a problem that the internal capacity is reduced. On the other hand, when R2 exceeds 100 mm, the spherically raised bottom portion is easily inverted from the vicinity of the boundary between the intermediate ring portion and the spherically raised bottom portion due to internal pressure. If R3 is less than 3 mm, there is a risk of breakage during molding. If it exceeds 10 mm, both the intermediate ring part and the spherically raised bottom part are easily reversed from the vicinity of the boundary between the outer edge ring part and the intermediate ring part due to internal pressure. Become. Further, if R1 <R3 <R2, the moldability is poor and the appearance of the container bottom is also poor. Also, if the height of the spherically raised bottom is 5 mm or less than twice R1, when pressure is applied to the inside of the container and both the intermediate ring part and the spherically raised bottom are reversed, the bottom wall bulges downward and the container is placed on the table. There is a risk that the container will fall over if placed on top.

Further, if the height of the spherically raised bottom exceeds 10 mm or 4 times R1, there is a problem that the formability of the raised bottom becomes severe and the material may be broken, and the internal capacity is also reduced.

    When the sealed container for hot beverages according to the invention of claim 1 is made to have such a cross-sectional shape, each surface of the polygon swells outward when the internal pressure of the container is increased, so that the flange of the container and the cover are fused to each other. Since the applied load is reduced and no gap is formed in the fused portion, no beverage leakage occurs. In addition, since the container has a polygonal cross section and is stronger than a circular one, the container is less likely to be deformed when the hot beverage in the container is cooled and the container is depressurized or when an impact is applied from the outside. Moreover, it is easy to hold and has a design effect.

  The sealed container for hot beverage according to the invention of claim 2 is the one in which the container of the sealed container for hot beverage according to claim 1 is filled with a beverage, sealed with a lid, and heated. Since there is no gap between the flange and lid of the container, there is no leakage of beverage, and due to its strength, hot beverage in the container is cooled and the container is depressurized, or an external impact is applied. Dice is difficult to deform. Moreover, since the container is a polygon, it is easy to hold and has a design effect.

  In order to specifically explain how the present invention is carried out, examples are given below. In the embodiments, front and rear refer to the front and rear in FIGS. 5 and 6, and left and right refer to the left and right when viewed from the front to the rear in FIG. 5.

  1 and 2 show a container A in a sealed container for hot beverages according to the present invention. This container A has a tapered cup shape, a flange 2 having a width of 6.2 mm including a curled edge width with a lower curled edge 1 having a width of 2.2 mm, and a step portion having a substantially L-shaped cross section at the mouth. 3, a 120 μm thick aluminum foil core layer 4 and a 200 μm thick film formed on the inner surface of the unstretched polypropylene coating layer 5 and a 30 μm thick film formed on the outer surface thereof A multilayer sheet 7 (see FIG. 10) comprising the unstretched polypropylene coating layer 6 and the ratio of the thickness of the aluminum foil core layer 4 to the total thickness of 34.3% is cold multistage deep drawing. The inner diameter D1 of the container A is 63 mm, the inner diameter D2 of the bottom is 52 mm, the depth H is 100 mm, and the ratio of the depth H to the inner diameter D1 is 1: 1. 58 and taper In which degree θ is made 3 °. As shown in FIG. 3, the body has a dodecagonal cross section, and the cross section of each surface 8 of the dodecagonal body is linear.

  As shown in FIG. 4, the bottom wall of the container A connects the downward convex arc-shaped outer edge ring portion 9, the upward convex arc-shaped spherical raised bottom portion 10, and the outer edge annular portion 9 and the spherical raised bottom portion 10 in the vertical cross section. The intermediate ring portion 11 has an obliquely upward intermediate ring portion 11. The radius of curvature R1 of the cross-section arc of the outer ring portion 9 is 3 mm, the radius of curvature R2 of the cross-section arc of the spherically raised bottom portion 10 is 63 mm, which is larger than the radius of the bottom inner diameter D2 of the container A. The radius of curvature R3 of the cross-section arc of the portion 11 is 5 mm, R1 <R3 <R2, and the height h of the spherically raised bottom 10 is 7.5 mm and 2.5 times R1.

  The upper surface of the flange 2 is a smooth horizontal surface, and a lid B made of an aluminum foil 13 having a heat sealant layer 12 made of a sealant on the lower surface is cut after filling the container A with a beverage, and the upper surface of the flange 2 is heated. The lid B is cut after being heat-sealed, and the peripheral edge of the lid B protrudes outward from the curl edge 1 as shown in FIG.

  Furthermore, as shown in FIGS. 5 and 6, the upper end of the container A is disposed at the upper end of the container A and the lid communication port forming member 16 is swingably disposed in the opening 15 provided in the top wall 14. A polypropylene short cylindrical cap C having an inverted L-shaped skirt portion 17 having a vertical cross section for covering is attached to the inner wall of the vertical wall 17a of the skirt portion 17 and a groove for inserting a curl edge between the horizontal wall 17b. 18 is formed (see FIG. 9), and when the cap C is put on the upper end of the container A, the vertical cross section inwardly convex arcuate ribs 19 are curled edges. The curl edge 1 is fitted into the groove 18 of the cap C so that the cap C is fixed to the container A. At this time, the peripheral edge of the lid B is turned to the curl edge 1. The container A is filled with a predetermined beverage, its mouth is sealed with a lid B, and the cap C is fixed to the container A, and then heated. An air layer having a height of about 10 mm is present between the lid B and the upper surface of the beverage L in the container A.

  The lid communication port forming member 16 includes a slit portion 20 and an operation lever portion 21 integrated therewith. The slit portion 20 has a substantially rectangular shape that is slightly longer in the left-right direction and has a rounded front end. The rear end is rounded with a substantially rectangular shape that is slightly shorter in the left-right direction and longer in the front-rear direction than the slit 20. The slit portion 20 and the operating lever portion 21 have shallow reinforcing recesses 22 and 23 that extend over both, and have a hanging edge portion around each. The front drooping edge portion of the slit 20 is provided with one front cutting blade 24 that is sharpened in a relatively large V shape for starting cutting, and the left and right drooping edge portions have a cut edge formed by the front cutting blade 24. Left and right saw-like cutting blades 25 are provided which extend the left and right ends and extend backward. The shape of the opening 15 is substantially similar to the planar shape of the lid communication port forming member 16, the front edge of the opening 15 reaches the front end of the peripheral wall 26 of the cap C, and the left and right edges and the rear edge of the opening 15 Are provided with hanging walls 27, 28. The rear drooping wall 28 is provided with a finger guide portion 29 having an arcuate downward convex arc shape extending rearward and continuing to the rear portion of the left and right drooping wall 27 in the vertical section. As illustrated in FIG. 6, the operation lever portion 21 extends rearward and obliquely upward, and there is an interval between the finger guide portion 29 and the operation lever portion 21 that can be lifted by the index finger. A vertical wing portion 30 projecting in a left-right extension is provided at the rear hanging edge of the slit 20, and is opposite to a bent portion that is bent obliquely forward and outward as viewed from the plane in the middle of the length of the left and right hanging wall 27. A shaped wall 31 is provided. The vertical portion 31a of the inverted L-shaped wall 31 is opposed to the vertical wing portion 30, and the thin horizontal portion 32 that can be bent with elasticity by connecting the lower ends of the left and right vertical wing portions 30 and the vertical portion 31a of the left and right inverted L-shaped wall 31 together. Is provided. The lower ends of the left and right hanging walls 27 on the front side of the vertical portion 31a of the inverted L-shaped wall 31 and the lower ends of the vertical portions 31a of the L-shaped wall 31 coincide with each other. The lower end of the hanging wall 27 coincides with the lower surface of the horizontal portion of the L-shaped wall 31. The rear end of the thin horizontal portion 32 becomes a swing fulcrum of the lid communication port forming member 16, and the slit 20 and the operating lever portion 21 are swingable like a seesaw using this as a fulcrum. A short lower projection 33 is provided at the center of the length of the rear hanging edge of the slit 20, and the center of the length of the front hanging edge of the operation lever portion 21 is cut off. A front engagement portion 34 having a short horizontal front protrusion 34a at the lower end is provided on the operation lever portion 21 so as to protrude downward. The horizontal front protrusion 34 a looks just below the lower end of the lower protrusion 33. The rear hanging edges on the left and right of the lower projection 33 of the slit 20 and the lower ends of the front hanging edges on the left and right of the central cutout of the operating lever 21 are connected together by a thin horizontal portion 35 that can be bent with elasticity. Yes.

  A right-angled triangular vertical wing stopper 36 is provided on the left and right hanging wall 27 of the opening 15 so as to face the vertical wing 30 at a position slightly forward of the vertical wing 30 so as to project inward. The stopper 36 lifts the operation lever portion 21 of the lid communication port forming member 16 to lower the tip of the slit 20 obliquely to the lid B. First, the front cutting blade 24 starts cutting the lid B, and then the left and right Cutting is continued with the saw-shaped cutting blade 25 to open the communication port 37 in the lid B. The communication port 37 allows the inside of the container A below the lid B to communicate with the inside of the cap C above the lid B. The stopper 36 is positioned so that the vertical wing portion 30 that is slanted during the swinging of the lid communication port forming member 16 hits the lower corner of the right triangle. The wall thickness of the stopper 36 is thin enough to bend with elasticity when the vertical wing 30 hits. When the vertical wing part 30 hits the stopper 36, the swinging of the slit 20 is once prevented by its resistance. However, when the control lever 21 is still lifted, the control lever 21 is placed at the upper end of the trailing edge of the slit 20. Since the upper end of the front drooping edge hits and pushes down the slit 20, the stopper 36 bends to allow passage of the vertical wing 30 to be moved, and returns to its original shape after the passage. When the lid communication port forming member 16 is swung counterclockwise in FIG. 7, the thin horizontal portion 32 which is vertical with the rear end as a fulcrum tries to return to its original shape by the elasticity after the communication port 37 is formed. As a result, the lid communication port forming member 16 swings clockwise in FIG. When the vertical wing 30 that has been inclined obliquely downward along with this swinging becomes horizontal while returning to the original, it hits the lower surface of the stopper 36 and the swinging of the lid communication port forming member 16 stops.

  In a state where the swinging of the lid communication port forming member 16 is stopped, the operation lever portion 21 is located at an obliquely upper front position and is located above the communication port 37 as shown by a solid line in FIG. Therefore, a rearwardly protruding rear engagement portion 38 is provided at the rear end of the rear hanging edge of the operation lever portion 21, and the operation lever portion 21 is tilted rearward so that the rear engagement portion 38 is moved to the front end of the finger guide portion 29. Engage with the bottom surface. The front end portion of the finger guide portion 29 is thin and elastic enough to allow the rear engagement portion 38 to pass therethrough. At this time, the front engaging portion 34 of the operation lever portion 21 is engaged with the front surface of the lower protrusion 33 that is horizontal to the slit portion 20. As a result, as shown by a provisional line in FIG. 7, the operation lever portion 21 becomes horizontal, substantially closes the second half of the opening 15 of the cap C, and conversely, the drinking mouth 39 is obtained in the first half.

  As shown in FIG. 9, a vertical cross-section V-shaped annular groove 40 is provided at the curl base of the curl edge 1, and a vertical cross-section at a position corresponding to the annular groove 40 on the lower surface of the horizontal wall 17 b of the skirt 17 of the cap C. A V-shaped lid biting annular hanging ridge 41 is provided. The height of the lid biting ring-shaped hanging protrusion 41 is 0.6 mm, which is slightly longer than the depth of the annular groove 40 of 0.4 mm. A vertical cross-section V-shaped lid pressing ring-shaped hanging ridge 42 is concentrically spaced at a predetermined interval and has a height lower than the height of the cover-cutting annular hanging ridge 41 by the thickness of the lid. 2, and the lid 37 is formed with the communication port 37, and then the beverage L leaks from the gap between the container A and the cap C. Block by Article 42.

It is a front view of the container in the container for sealing a hot beverage according to the present invention. It is a top view of the container of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. It is an expanded vertical sectional view of a container bottom. It is a top view of the container for sealing for hot drinks by this invention. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is the partial expansion vertical expanded sectional view of the container for sealing of the hot drink by this invention which shows the state which opened the communicating port in the lid | cover of the container and provided the drinking port in the cap. FIG. 6 is an enlarged cross-sectional view taken along line VIII-VIII in FIG. 5. It is a partial expanded detailed vertical sectional view which shows the state which attached the cap to the container sealed with the lid | cover. It is a partial enlarged detail vertical sectional view of a container sealed with a lid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Curl edge 2 Flange 3 Aluminum foil core layer 4, 5 Synthetic resin coating layer 8 Each cross-sectional polygonal surface of the container 12 Heat seal material layer 13 Aluminum foil 17 Cap skirt A Container B Cover C Cap

Claims (2)

  Tapered cup-shaped body which has an aluminum foil core layer and a synthetic resin coating layer formed on both sides thereof and has a flange, a heat sealing material layer on the lower surface, and is fused to the upper surface of the flange of the container A lid made of aluminum foil, a lid communication port forming member attached to the upper end of the container and swingably disposed in an opening provided on the top wall, and a reverse vertical section for covering the upper end of the container at the lower end In a beverage sealed container comprising a short cylindrical cap having an L-shaped hem, the container has a cross section of 8 to 16 polygons, and the cross section of each surface is linear or slightly inwardly convex A sealed container for hot beverages. A sealed container containing a hot beverage, wherein the container of the sealed container for hot beverage according to claim 1 is filled with a beverage, sealed with a lid, and heated.

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